Yuuki Reiko, member of the Occult Club, barges into the Sket-dan's room holding a picture of one of Kaimei Academy's seven mysteries, the "Ghost of the Incinerator". The Sket-dan are on the case (mainly Switch), trying to find out the truth behind the picture, and getting Shimada Takako from the Newspaper Club mixed up in it, too...
Which means this isn't the picture 
that Yuuki-san took on Tuesday!
¡Eso significa que ésta no es la 
foto que tomó Yuuki-san el martes!
¡Eso significa que esta no es la 
foto que tomó Yuuki-san el martes!
O que quer dizer que não é a
 foto que a Yuuki tirou na terça!